Yes, I do not add an extra seat for the final table.
Background: We're usually around 20 players, +/-5. We play 8 per table, because I think 10 is a bit too many, it slows down the game. In tourneys, the more hands per hour the earlier people are gonna be eliminated, and therefore the higher the average stacks will be, allowing more play for the survivors. Having fewer players also ramps up the aggression which also helps. In my experience, the beginning of the final table is the slowest part of the tourney because blinds are usually high and it feels like every decision is for your stack, hence lots of tanking. I've played at homegames where we got like four or five hands the first 20 minute level of the 10-handed final table. Half am orbit. Awful!
Therefore, there's no way I'm increasing from 8 to 9 at this stage! In fact, I'd rather do the opposite...
IME, in general having 8 instead of 10 helps keep the average stacks higher and allows the players more hands per hour. Keeping it at 8 for the final table helps in keeping up the nr hands/h at a slow part of the tourney, therefore also eliminations per level, the latter allowing the survivors to play a bit deeper.
I reduce the BB ante to half when ITM (usually 4 or 5 players). I want the bubble play to have the full ante so it doesn't take forever for it to burst and leave all survivors short stacked. When heads-up I remove it completely.
Also: Anyone who is doing host duties is NOT folded if they're not in their seat. There will be no poker nights without these tasks being carried out, so the table will have to wait.